Journal article
MXene-based suspension electrode with improved energy density for electrochemical flow capacitors
Journal of power sources, Vol.506, 230187
15 Sep 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The development of high capacitance materials with high packing density and low viscosity in suspension electrodes is critical for progressing towards high-efficiency, low-footprint electrochemical flow capacitors (EFCs). Here, we report on the first electrochemical and rheological characterization of MXene-based suspension electrodes, using multilayer Ti3C2Tx as the active material and carbon black (CB) as the conductive additive in symmetric and asymmetric EFC devices. In the case of symmetric Ti3C2Tx devices, the Ti3C2Tx concentration is fixed to 22 vol.% in the slurry and the CB concentration is varied from 0.5 to 2.0 vol.%. The symmetric device arrangement offers a high capacitance of 240 F ml−1 (2 mV s−1) and volumetric energy density of 2.65 Wh l−1 @ power density of 47.82 W l−1. Additionally, to extend the potential window, an asymmetric device assembly of activated carbon and Ti3C2Tx is investigated. This arrangement allows a stable operating potential window of 1 V with an energy density of 4.12 Wh l−1 and power density of 31.73 W l−1. Overall, multilayer Ti3C2Tx seems to be excellent candidate for flowable electrode applications, offering high capacitance, energy density and low viscosity due to its high electrochemical activity, excellent electrical conductivity, and versatile surface chemistry.
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• A Ti3C2Tx suspension electrode has been prepared.
• The potential of Ti3C2Tx for electrochemical flow capacitors (EFC) was revealed.
• A high volumetric capacitance was achieved for Ti3C2Tx in suspension electrode.
• A novel approach for MXene-based asymmetric EFC has been explored.
• A significant improvement in the volumetric power/energy density was observed.
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Details
- Title
- MXene-based suspension electrode with improved energy density for electrochemical flow capacitors
- Creators
- Pushpendra Singh - Drexel UniversityBilen Akuzum - Drexel UniversityChristopher E. Shuck - Drexel UniversityKaushik Pal - Indian Institute of Technology RoorkeeYury Gogotsi - Drexel University, Materials Science and EngineeringE. Caglan Kumbur - Drexel University, Mechanical Engineering and Mechanics
- Publication Details
- Journal of power sources, Vol.506, 230187
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Mechanical Engineering and Mechanics
- Identifiers
- 991019168474904721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Electrochemistry
- Energy & Fuels
- Materials Science, Multidisciplinary